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Ideas for 'Universal Arithmetick', 'Capitalist Realism' and 'Regressive Method for Premises in Mathematics'

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6. Mathematics / B. Foundations for Mathematics / 2. Proof in Mathematics

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It seems absurd to prove 2+2=4, where the conclusion is more certain than premises [Russell]

6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / b. Greek arithmetic

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A number is not a multitude, but a unified ratio between quantities [Newton]